﻿// --------------------------------------------------------------------------------------------------------------------
// <copyright file="Configuration.cs" company="Rolosoft Ltd">
//   © Rolosoft Ltd
// </copyright>
// --------------------------------------------------------------------------------------------------------------------

#region License

// Copyright 2013 Rolosoft Ltd
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion

namespace Rsft.Net.Dns.Helpers
{
    #region Usings

    using System.Collections.Generic;
    using System.Net;

    #endregion

    /// <summary>
    /// The configuration.
    /// </summary>
    public static class Configuration
    {
        #region Constants

        /// <summary>
        ///     The default recursion
        /// </summary>
        private const bool DefaultRecursion = true;

        /// <summary>
        ///     The default retries
        /// </summary>
        private const int DefaultRetries = 3;

        /// <summary>
        ///     The default timeout in milliseconds.
        /// </summary>
        private const int DefaultTimeout = 2000;

        /// <summary>
        ///     The default transport type.
        /// </summary>
        private const TransportType DefaultTransportType = TransportType.Udp;

        #endregion

        #region Public Methods and Operators

        /// <summary>
        /// Gets the default configuration.
        /// </summary>
        /// <returns>
        /// The <see cref="Configuration"/>.
        /// </returns>
        public static Entities.DnsConfiguration DefaultConfiguration
        {
            get
            {
                var configuration = new Entities.DnsConfiguration();

                var localDefaultDnsServers = DnsServer.LocalDefaultDnsServers;

                var dnsServers = new List<IPEndPoint>();

                foreach (IPEndPoint localDefaultDnsServer in localDefaultDnsServers)
                {
                    dnsServers.Add(localDefaultDnsServer);
                }

                configuration.DnsServers = dnsServers;
                configuration.DnsTimeout = DefaultTimeout;
                configuration.Retries = DefaultRetries;
                configuration.TransportType = DefaultTransportType;
                configuration.UseRecursion = DefaultRecursion;

                return configuration;
            }
        }

        #endregion
    }
}